// collections/GenericsAndUpcasting.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.

import java.util.ArrayList;

class GrannySmith extends Apple {
}

class Gala extends Apple {
}

class Fuji extends Apple {
}

class Braeburn extends Apple {
}

public class GenericsAndUpcasting {
    public static void main(String[] args) {
        ArrayList<Apple> apples = new ArrayList<>();
        apples.add(new GrannySmith());
        apples.add(new Gala());
        apples.add(new Fuji());
        apples.add(new Braeburn());
        for (Apple apple : apples)
            System.out.println(apple);
    }
}
/* Output:
GrannySmith@15db9742
Gala@6d06d69c
Fuji@7852e922
Braeburn@4e25154f
*/
